[keyboard] Add a stub for unit tests

src/modules/keyboard/CMakeLists.txt

@@ -21,3 +21,10 @@ calamares_add_plugin( keyboard
         calamaresui
     SHARED_LIB
 )
+
+calamares_add_test(
+    keyboardtest
+    SOURCES
+        Tests.cpp
+        SetKeyboardLayoutJob.cpp
+)

src/modules/keyboard/Tests.cpp

@@ -0,0 +1,64 @@
+/* === This file is part of Calamares - <https://calamares.io> ===
+ *
+ *   SPDX-FileCopyrightText: 2020 Adriaan de Groot <groot@kde.org>
+ *   SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   Calamares is Free Software: see the License-Identifier above.
+ *
+ */
+#include "utils/Logger.h"
+
+#include <QtTest/QtTest>
+
+// Internals of SetKeyboardLayoutJob.cpp
+extern QString findLegacyKeymap( const QString& layout, const QString& model, const QString& variant );
+
+class KeyboardLayoutTests : public QObject
+{
+    Q_OBJECT
+public:
+    KeyboardLayoutTests() {}
+    virtual ~KeyboardLayoutTests() {}
+
+private Q_SLOTS:
+    void initTestCase();
+
+    void testSimpleLayoutLookup_data();
+    void testSimpleLayoutLookup();
+};
+
+void
+KeyboardLayoutTests::initTestCase()
+{
+    Logger::setupLogLevel( Logger::LOGDEBUG );
+}
+
+void
+KeyboardLayoutTests::testSimpleLayoutLookup_data()
+{
+    QTest::addColumn< QString >( "layout" );
+    QTest::addColumn< QString >( "model" );
+    QTest::addColumn< QString >( "variant" );
+    QTest::addColumn< QString >( "vconsole" );
+
+    QTest::newRow( "us" ) << QString( "us" ) << QString() << QString() << QString( "us" );
+}
+
+
+void
+KeyboardLayoutTests::testSimpleLayoutLookup()
+{
+    QFETCH( QString, layout );
+    QFETCH( QString, model );
+    QFETCH( QString, variant );
+    QFETCH( QString, vconsole );
+
+    QCOMPARE( findLegacyKeymap( layout, model, variant ), vconsole );
+}
+
+
+QTEST_GUILESS_MAIN( KeyboardLayoutTests )
+
+#include "utils/moc-warnings.h"
+
+#include "Tests.moc"